Blue Wrens and falcons

We have had some wonderful birds visit up recently. They arrived at around the same time. Which is interesting. Do they use eachother for some purpose.

Its not a good picture but they don't keep still for long. I am still trying to get better shots.

 When these birds of prey zoom around between the trees they look like sharks. Grey backs showing as they bank around a tree. Wing pointing up and then tail behind it. Looks like shark fins. And they do terrify all other birds.
But maybe the wrens are like pilot fish and fly under the falcons view and then are safe from magpies and miners! Just a theory!
Dayla